debugfs: Re-use kstrtobool_from_user()
Re-use kstrtobool_from_user() instead of open coded variant.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 1f99678f..4fce1da 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -796,19 +796,13 @@ EXPORT_SYMBOL_GPL(debugfs_read_file_bool);
ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
- char buf[32];
- size_t buf_size;
bool bv;
int r;
bool *val = file->private_data;
struct dentry *dentry = F_DENTRY(file);
- buf_size = min(count, (sizeof(buf)-1));
- if (copy_from_user(buf, user_buf, buf_size))
- return -EFAULT;
-
- buf[buf_size] = '\0';
- if (strtobool(buf, &bv) == 0) {
+ r = kstrtobool_from_user(user_buf, count, &bv);
+ if (!r) {
r = debugfs_file_get(dentry);
if (unlikely(r))
return r;